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Vanguard class submarine

The Royal Navy's Vanguard class of nuclear ballistic missile submarines (SSBNs) includes four boats: Vanguard (S28), Victorious (S29)[?], Vigilant (S30)[?], and Vengeance (S31)[?].

General Characteristics

Displacement: 15,900 tons submerged
Length: 149.9 meters
Beam: 12.8 meters
Draught: 12 meters
Complement: 14 officers, 121 ratings
Armament:
- 16 missile tubes capable of firing Trident D5 missiles
- four torpedo tubes capable of firing Spearfish torpedoes
Sensors:
- sonar (bow, flank, active intercept, and towed arrays)
- periscopes: (attack and search)
- collision avoidance radar

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